Diagnosing oil usage

[nitro71]

So, my X is going through about 4 quarts between oil changes. Probably won't need to change oil ever at this rate. Problem is that I don't know where it's going. I see what looks like some pooling on the bottom of the oil pan but that's it. I don't see any clouds of smoke behind the vehicle. Would a rear main seal only leak while driving? I'm unsure how to pinpoint the leak or if it's burning it. There are no puddles under the vehicle.

 

[Verno]

If you can, try to put a piece of cardboard under it when you park it, this will help identify if and where there may be a leak.
You are probably using oil (burning) rather han leaking.

 

[nitro71]

I park on cleanish concrete so I can tell if it's leaking. Only thing leaking is the steering gear. So you think I could be burning that much oil and not see any smoke?